.top-nav {
    /* position: absolute;
    z-index: 10;  */
    width: 100%;
    height: 60px;
    /* 设置弹性盒子 */
    background-color: #1d1d1d;
    display: flex;
    /* 设置垂直对齐方式 */
    align-items: center;
    /* 设置水平对齐方式 */
    justify-content: space-between;
    padding: 0 30px;
    border-bottom: 1px solid #00bdff;
    box-sizing: border-box;
    /* position: absolute;
    top: 0; */
}

.menu a {
    margin: 0 15px;
    display: inline-block;
    font-size: 14px;
    color: white;
    height: 56px;
    line-height: 56px;
    /* border-bottom: 2px solid white;  */
}

.menu a:hover {
    color: #00bdff;
    border-bottom: 1px solid #00bdff;
}

/* 顶部按钮样式设置 */
.in {
    border: 2px solid gray;
    color: white;
    font-size: 14px;
    padding: 6px;
    border-radius: 15px;
    display: inline-block;
    text-align: center;
    width: 40px;
    height: 15px;
    line-height: 15px;
}

.register {
    border: 1px solid #ed510a;
    background-color: #ed510a;
    color: white;
    font-size: 14px;
    padding: 6px;
    border-radius: 15px;
    display: inline-block;
    text-align: center;
    width: 60px;
    height: 15px;
    line-height: 15px;
}

/* 身份实名认证部分样式 */
.beijing {
    position: relative;
    width: 100%;
    height: 300px;
    background-color: #1d1d1d;
    padding-top: 60px;
    box-sizing: border-box;
}

.identity {
    position: absolute;
    left: 20px;
    top: 100px;
}
.industry{
    position: relative;
    top: -250px;
    color: white;
    text-align: center;
}
.industry h1{
    margin: 20px 0;
    font-size: 36px;
    
}
.industry h4{
    margin: 20px;
}
.industry span{
    margin: 5px;
    display: inline-block;
    width:6px;
    height: 2px;
    background-color: white;
}
/* 页面主体部分样式 */
.main-div{
    background-color: #f8f8f8;
    height: 1800px;
    margin-bottom: 30px;
}
.main-div h3{
    margin: 20px 0 5px 0;
    color: black;
}
.main-div span{
    color: gray;
    font-size: 14px;
}
.main-div .horizontal-line{
    /* display: inline-block; */
    height: 3px;
    width: 10px;
    background-color: #0070d9;
}
.main-div li{
    float: left;
    padding: 10px;
    margin: 15px;
    width: 360px;
    height: 315px;
    border: 1px solid #eee;
    box-sizing: border-box;
}
.main-div li img{
    width: 340px;
}
.main-div li h2{
    margin: 15px 0;
    color: #1d1d1d;
}
.main-div p{
    font-size: 12px;
    line-height: 16px;
    color: #666;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 4;
    margin-bottom: 15px;
    overflow: hidden;
}
.main-div a{
    color: #0070d9;
    font-size: 12px;
}
/* 下面很多图片的样式 */
.picture-div .picture-more{
    text-align: center;
    padding-top: 50px;
    margin-left: 20px;
    margin-top: 20px;
    width: 360px;
    height: 150px;
    background-color: white;
    box-sizing: border-box;
}

.jump{
    width: 60px;
    height: 200px;
    line-height: 30px;
    position: fixed;
    left: 50%;
    bottom: 200px;
    margin-left: 550px;
    cursor: pointer;
}
.jump a{
    position: relative;
}
.line-blue::before{
    content: "";
    width: 10px;
    height: 3px;
    background-color: #0070d9;
    position: absolute;
    top:8px;
    left: -12px;
}









/* 页尾 */
.footer dl{
    width: 100px;
    margin-right: 30px;
    float: left;
  }
  .footer dt{
    color: black;
    font-size: 18px;
    font-weight: 600;
    margin:15px 0;
  }
  .footer dd{
    line-height: 20px;
  }
  .footer-div{
    float: right;
  }
  .footer-div p{
    margin:20px 0;
  }
  .footer .tel{
    float: left;
    margin-top: 30px;
  }
  .jl{
  display: inline-block;
    width: 25px;
    height: 25px;
    background-image: url("../images/bei2.png");
    background-position: 0px 6px;
    background-repeat: no-repeat;
  }
  .jll{
    display: inline-block;
    width: 25px;
    height: 25px;
    background-image: url("../images/bei1.png");
    background-position: 6px 4px;
    background-repeat: no-repeat;
  }
  .copyright{
    margin-top: 40px;
    float: right;
  }